15 mL Centrifuge Tube & Transport Vial Screw Caps — HDPE, Red, 1000/Bag (300-3010-R2N)
These red high-density polyethylene screw caps from Caplugs® Evergreen are designed to seal 15 mL centrifuge tubes and 7 mL transport vials (240-3007/240-3010 family) with a leak-free threaded engagement meeting IATA P650 primary container requirements. Supplied non-sterile in 1000/Bag, they support the full spectrum of clinical and biorepository workflows — from serum separation centrifugation through frozen archiving at -80°C and autoclave sterilization at 121°C. The red color follows the CLSI H3 convention for serum/no-additive tube identification, enabling reliable visual specimen routing without additional labeling.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (MPN) | 300-3010-R2N |
| Cap Type | Screw cap — threaded engagement |
| Material | High-Density Polyethylene (HDPE) |
| Color | Red |
| Tube Compatibility | Caplugs® Evergreen 15 mL centrifuge tubes; 240-3007 / 240-3010 7 mL transport vials |
| IATA P650 Compliance | Yes — leak-free primary container seal |
| Cryogenic Storage | Compatible at -20°C and -80°C |
| Autoclave Compatibility | 121°C / 15 psi |
| Sterility | Non-Sterile |
| BPA / Phthalates | BPA-free; no phthalate plasticizers |
| Pack Size | 1000/Bag |
| Country of Origin | USA |
Applications
- Sealing 15 mL centrifuge tubes through centrifuge runs for serum or plasma separation — threaded engagement retains the cap under centrifugation forces
- Leak-free primary closure for 7 mL transport vials (240-3007 / 240-3010) shipped under IATA P650 biological specimen transport regulations
- Color-coded specimen-type routing in clinical chemistry and immunoassay batch workflows, leveraging the CLSI H3 red-top convention for serum/no-additive identification
- Long-term frozen archiving of biobank aliquots at -20°C and -80°C, where HDPE's higher crystallinity maintains consistent thread engagement through repeated freeze-thaw cycles
- Replacement or color-differentiated capping for existing Caplugs® Evergreen 15 mL tube inventories in multi-specimen collection programs
Chemical Resistance
| Reagent / Condition | Compatibility |
|---|---|
| Aqueous buffers, serum, plasma | Excellent |
| Dilute acids (<10%) | Good |
| Short-chain alcohols (brief contact) | Good |
| DMSO (≤10%) | Good |
| Storage at -20°C / -80°C | Suitable — HDPE cryo stability |
| Autoclave (121°C / 15 psi) | Compatible |
| Concentrated organic solvents (chloroform, acetone, aromatic hydrocarbons) | Not recommended |
Quality & Procurement
Made in USA, these Caplugs® Evergreen caps are manufactured from BPA-free, phthalate-free HDPE resin under ISO 9001 quality management. HDPE's elevated crystallinity versus low-density polyethylene delivers the thread-wall rigidity required for consistent torque engagement and cap retention across centrifugation, cryogenic archiving, and autoclave sterilization cycles. LabSupplies.com is an authorized Caplugs® Evergreen dealer and ships from domestic inventory, typically same business day for stocking items. Tiered pricing and sample requests are available for institutional, hospital, and biorepository procurement programs — always validate cap-to-tube thread fit with a sample before committing to bulk purchase.
Frequently Asked Questions
Are these caps certified for shipping biological specimens?
Yes — the threaded screw engagement on part number 300-3010-R2N meets IATA P650 requirements for leak-free primary container closure, making these caps appropriate for regulated biological specimen transport when used with a compatible tube.
Can these caps be autoclaved along with the tubes?
Yes. HDPE is compatible with standard autoclave conditions at 121°C / 15 psi, so caps and tubes can be sterilized together as assembled units when sterile processing is required for your workflow.
Will these caps fit tubes from other manufacturers?
They are validated for Caplugs® Evergreen 15 mL centrifuge tubes and 240-3007 / 240-3010 transport vials. Thread pitch and neck dimensions vary by manufacturer, so it is strongly recommended to request a free sample and verify fit before switching from an existing OEM cap supply.
Why are the caps red rather than a neutral color?
Red follows the CLSI H3 convention for serum/no-additive tube identification — the same color designation used on red-top blood collection tubes. Using matching cap colors on 15 mL centrifuge tubes and transport vials lets clinical and research staff route serum-containing specimens by visual inspection without relying solely on written labels.